Climate change scenarios require reconsidering different agricultural practices including sowing dates and irrigation intervals. For this purpose, a field experiment was carried out at the Agricultural Research Farm of Sakha Agricultural Research Station, Kafr-Elsheikh Governorate during the successive winter seasons 2013/2014 and 2014/2015 to investigate the impact of deficit water irrigation and sowing dates on wheat crop productivity(Triticum aestivum L.). The experimental site located at latitude of 30˚: 37͞  N, longitude of 31 ˚ - 57͞  E, and altitude of +6 meters above the sea level. The experimental design was split – plot with three replicates.  The main plot was assigned to sowing dates of 15^th November (S₁) , 30^th November (S₂) and 15^th December (S₃), while the sub plot was assigned to irrigation treatments i.e. I₁ (given four irrigations plus the sowing irrigation, I₂ (given three irrigations following  the sowing irrigation) and I₃ (given two irrigations after the sowing irrigation). The highest mean values of water applied (Wa) and consumptive use (CU) were 613.6 and 485.6 mm under treatment S₁I₁ , respectively. While the corresponding lowest mean values were 363.3 and 310.4 mm under treatment S₃I₃ . The highest contribution percentages of rainfall to water applied (Wa) were  46.6% and 38.4 %  for treatments S₃I₃  under third sowing date in the first season. While, in the second season were 43.4% and 35.7% for treatments S₂I₃ under the two sowing date, respectively. The lowest contribution percentages were 27.3%, 31.7 %  and 27.8% , 32.4% for treatment S₁I₁  under first sowing date in two seasons. Moreover, the highest mean values of grain water productively (WP_g), straw water productively (WP_s) were recorded under S₁ and I₃ in the first season with values of 1.47, 1.48,   2.27 and 2.19 kg m^-3, respectively. While in the second season the highest values were recorded under S₂ and I₃ with values 1.7, 1.59,   2.31 and 2.41 kg m^-3, respectively. The highest mean values of productivity of water applied for grain and straw (PWag , PWas ) were recorded under S₂, I₃, in two growing seasons with values of 1.17, 2.23, 1.39, 1.33,1.82, 1.89, 1.97 and 1.92 kg m^-3, respectively. In addition, biological yield, grain yield, straw yield, plant height and 1000-grain weight given the highest values under S₁I₁ , S₂I₁ in the two seasons.